Old OCA theory recommends to unite homogenous countries so that their macroeconomic interrelations do not pose severe stabilisation problems. New OCA theory rightly criticizes the 1960s flavour of the old approach and believes in the endogenous emergence of an OCA if countries use the facilities...

A hybrid standard macro model is supplemented by an explicit analysis of bank lending, based on a five-position aggregative balance sheet. In the model's two versions credit supply is based on a leverage targeting rule or on simple optimisation, taking into account lending risks and funding...

Economists in the public are accused of propagating highly professional, but unrealistic theories that mislead market agents and policy makers to place too much confidence in rational behaviour and market equilibrium. The paper analyses to what extent the US banking crisis and the euro crisis...

Die Staatsschuldenkrise einiger Länder in der EWU ist letztlich doch eine Währungskrise. Nur im gemeinsamen Währungsraum war es überhaupt möglich, die Schuldaufnahme stark auszuweiten. Andererseits treten bei Zweifeln an der finanziellen Solidität von Schuldnerstaaten kumulative...